It doesn't seem to matter what time I stop by Potbelly; there's invariably a line of hungry 20- and 30-somethings waiting to get their sandwich fix. Yes, there's a potbelly stove inside, as well as a player piano and other Old West saloon-type memorabilia, but go here for the mouthwatering made-to-order namesake comestibles (that's all they serve). Prepared on homemade sub rolls stuffed with your choice of turkey, Italian meats, veggies, pizza ingredients, and more, and layered with lettuce, tomato, onion, pickles, and Italian seasonings, they're warmed in a countertop toaster oven. Even with all the fixin's, each is under $5 (unlike the massive subs found at many other spots, Potbelly's are the more the size of normal sandwiches). Tempting milkshakes keep the blender mighty busy. And the good news about those lines: The behind-the-counter staff are experts at keeping things moving, so you never end up waiting too long. Potbelly has other locations at 190 N. State St. (tel. 312/683-1234) and in The Shops at North Bridge, 520 N. Michigan Ave. (tel. 312/527-5550), which are convenient to the Loop and Mag Mile.